- Yannan Xuan
- Peichao Luo
- Zebin Wang
- Jianxin Shou
- Shuiying Xiong
- Wenze Wu
- Meng Tang
- Jiangping Song
- Gusheng Wang
- Xiaohong Sun
- Haoqiang Zhou
- Shichao Ren
- Jianbo Xu
- Li Han
- Jiankang Liu
- Xiaojie Lou
- Peng Li
- Chunxia Hu
- Anyu Mei
- Chengguang Chen
- Hai Wang
- Chengcai Huang
- Cheng Guang Chen
- Jian Fu
- Li Hang
- Pu Huang
- Guijia Qiu
- Yuanyuan Wu
- Luyi Qi
- Linfa Bao
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Qiu, Muqing
- Adsorption of Methylene Blue by Activated Carbon from Capsicum Straw
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 14, No 4 (2015), Pagination: 859-864Abstract
Dyes are known to be toxic, carcinogenic and mutagenic. Their release into the environment can cause aesthetic pollution, and moreover, they are not degraded by conventional aerobic wastewater treatment due to their recalcitrance. Therefore, it is necessary to reduce dye concentration in the wastewater. Activated carbon was obtained from capsicum straw by chemical activation using KOH as an activator. Then it was used as an adsorbent for the removal of dye methylene blue. The adsorption of dye methylene blue by activated carbon was carried out in detail. Kinetic adsorption data were analysed by the pseudo-first-order kinetic model, the pseudo-second-order model and the intraparticle diffusion model. The experimental data were analysed by the Langmuir and Freundlich models of adsorption. The thermodynamics parameters were also calculated.Keywords
Adsorption, Methylene Blue, Activated Carbon, Capsicum Straw.References
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- Kauspsdiens, D., Kazlauskienë, E., Gefenienë, A. and Binkienë, R. 2010. Comparison of the efficiency of activated carbon and neutral polymeric adsorbent in removal of chromium complex dye from aqueous solutions. J. Hazard. Mater., 179: 933-939.
- Langmuir, I. 1916. The constitution and fundamental properties of solids and liquids. J. Am. Chem. Soc., 38: 2221-2295.
- Li, W.H., Yue, Q.Y., Gao, B.Y., Ma, Z.H., Li, Y.J. and Zhao, H.X. 2011. Preparation and utilization of sludge-based activated carbon for the adsorption of dyes from aqueous solutions. Chem. Eng. J., 171: 320-327.
- Li, Y.H., Liu, T.H., Peng, X.J., Wang, J.J., Sun, J.K., Wang, Y.H., Wu, S.L., Wang, Z.H., Xia, Y.Z. and Xia, L.H. 2013. Comparative study of methylene blue adsorption onto activated carbon, grapheme oxide, and carbon nanotubes. Chem. Eng. Res. Design, 91: 361-368.
- Liu, W.H., Yue, Q.Y., Tu, P., Ma, Z.H., Gao, B.Y., Li, J.Z. and Xu, X. 2011. Adsorption characteristics of dyes in columns of activated carbon prepared from paper mill sewage sludge. Chem. Eng. J., 178: 197-203.
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- Machado, F.M., Bergmann, C.P., Fernandes, T.H.M., Lima, E.C., Royer, B., Calvete, T. and Fagan, S.B. 2011. Adsorption of reactive red M2BE dye from water solutions by multi-walled carbon nanotubes and activated carbon. J. Hazard. Mater., 192: 1122-1131.
- Muthiulan, P., Meenakshisundararam, M. and Kannan, N. 2013. Beneficial role of ZnO photocatalyst supported with porous activated carbon for the mineralization of alizarin cyanin green dye in aqueous solution. J. Adv. Res., 4: 479-484.
- Nabil, G.M., Mallah, N.M.E. and Mahmoud, M.E. 2014. Enhanced decolorization of reactive black 5 dye by active carbon sorbent-immobilizedcationic surfactant (AC-CS). J. Ind. Eng. Chem., 20: 994-1002.
- Niu, C., Wu, W., Wang, Z., Li, S. and Wang, J. 2007. Adsorption of heavy metal ions from aqueous solution by crosslinked carboxymethyl konjac glucomannan. J. Hazard. Mater., 141: 209-214.
- Njoku, V.O., Foo, K.Y., Asif, M. and Hameed, B.H. 2014. Preparation of activated carbons from rambutan (Nephelium lappaceum) peel by microwaveinduced KOH activation for acid yellow 17 dye adsorption. Chem. Eng. J., 250: 198-204.
- Nuithitikul, K., Srikhun, S. and Hirunpraditkoon, S. 2010. Kinetics and equilibrium adsorption of basic green 4 dye on activated carbon derived from durian peel: effects of pyrolysis and post-treatment conditions.J. Taiwan Inst. Chem. Eng., 41: 591-598.
- Ranjithkumar, V., Sangeetha, S. and Vairam, S. 2014. Synthesis of magnetic activated carbon/α-Fe2O3 nanocomposite and its application in the removal of acid yellow 17 dye from water. J. Hazard. Mater., 273: 127-135.
- Ribeiro, R.S., Fathy, N.A., Attia, A.A., Silva, A.M.T., Faria, J.L. and Gomes, H.T. 2012. Activated carbon xerogels for the removal of the anionic azo dyes orange II and chromotrope 2R by adsorption and catalytic wet peroxide oxidation. Chem. Eng. J., 195-196: 112-121.
- Salima, A., Benaouda, B., Noureddine, B. and Duclaux, L. 2012. Application of ulva lactuca and systoceira stricta algae-based activated carbons to hazardous cationic dyes removal from industrial effluents. Water Res., 47: 3375-3388.
- Thinakaran, N., Panneerselvam, P., Baskaralingam, P., Elango, D. and Sivanesan, S. 2008. Equilibrium and kinetic studies on the removal of acid red 114 from aqueous solutions using activated carbons prepared from seed shells. J. Hazard. Mater., 158: 142-150.
- Vargas, A.M.M., Martins, A.C. and Almeida, V.C. 2012. Ternary adsorption of acid dyes onto activated carbon from flamboyant pods (Delonix regia): analysis by derivative spectrophotometry and response surface methodology. Chem. Eng. J., 195-196: 173-179.
- Wang, L., Yao, Y.Y., Sun, L.J., Mao, Y.J., Lu, W.Y., Huang, S.Q. and Chen, W.X. 2014. Rapid removal of dyes under visible irradiation over activated carbon fibers supported Fe(III)-citrate at neutral pH. Sep. Purif. Technol., 122: 449-455.
- Wang, L., Zhang, J., Zhao, R., Li, C., Li, Y. and Zhang, C.L. 2010. Adsorption of basic dyes on activated carbon prepared from Polygonum orientale Linn: equilibrium, kinetic and thermodynamic studies. Desalination, 254: 68-74.
- Yu, L. and Luo, Y.M. 2014. The adsorption mechanism of anionic and cationic dyes by Jerusalem artichoke stalk-based mesoporous activated carbon. J. Environ. Chem. Eng., 2: 220-229.
- Removal of Nickel from Aqueous Solutions by Activated Carbon Prepared from Sewage Sludge
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 14, No 3 (2015), Pagination: 669-672Abstract
Activated carbon has been prepared from sewage sludge of the municipal wastewater treatment plant using chemical activation method. Porous structure of activated carbon was characterized by nitrogen adsorption and scanning electron microscopy. It was also characterized by its surface area and porosity. Its surface is an irregular and porous structure. Then it was used as an adsorbent for the removal of nickel ions from aqueous solution. The effects of parameters such as contact time and initial nickel ion concentration were investigated. The adsorption kinetics of nickel ions in aqueous solution onto activated carbon was investigated through experimental data. The results showed that the adsorption process was perfectly fitted to the pseudo-second order model with very high regression coefficient. It may be evaluated as an environmental friendly and extra economic treatment of nickel ions in aqueous solution.Keywords
Activated Carbon, Porous Materials, Sewage Sludge, Nickel Ions.- Adsorption of Cadmium (Cd2+) Ions from Aqueous Solutions on the Modified Montmorillonite
Authors
1 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 2 (2016), Pagination: 503-508Abstract
Heavy metal pollution has become one of the most serious environmental problems today due to its difficulty in removal, especially in aquatic environments. The technologies for heavy metal ion removal from aqueous solutions are, chemical treatment, physico-chemical treatment and biological treatment. However, the existing methods are relatively expensive. Therefore, there is an urgency that some environmentally sound and practically feasible technologies or sorbents are needed to be developed. In this study, a modified montmorillonite was used for the removal of Cd2+ ions from aqueous solutions. The influence of various operating parameters on the adsorption process was investigated. The kinetics and equilibrium adsorption of Cd2+ ions from aqueous solutions using the modified montmorillonite were also discussed in detail. The objective of this study is to provide fundamental information on the adsorption of heavy metals from aqueous solution on the modified montmorillonite and to investigate the possible mechanisms.Keywords
Adsorption, Cd2+ Ions, Modified Montmorillonite, Kinetic Equilibrium.References
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- Foo, K.Y. and Hameed, B.H. 2012. Mesoporous activated carbon from wood sawdust by K2CO3 activation using microwave heating. Biores. Technol., 111: 425-432.
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- Langmuir, I. 1918. The adsorption of gases on plane surfaces of glass, mica and platinum. J. Am. Chem. Soc., 40: 1361-1403.
- Martin, M.A., Thomas, J.R. and Carla, M.K. 2011. Assessing Cd, Co, Cu, Ni, and Pb sorption on montmorillonite using surface complexation models. Appl. Geochem., 26: S154-S157.
- Pablo, L.D., Chávez, M.L. and Abatal, M. 2011. Adsorption of heavy metals in acid to alkaline environments by montmorillonite and Camontmorillonite. Chem. Eng. J., 171: 1276-1286.
- Tan, I.A.M., Ahmad, A.L. and Hameed, B.H. 2009. Adsorption isotherms, kinetics, thermodynamics and desorption studies of 2,4,6trichlorophenol on oil palm empty fruit bunch-based activated carbon. J. Hazard. Mater., 164: 473-482.
- Vanessa, E.D.A., Jarbas, R.R., Solange, C., Giberto, A. and Marco, T.G. 2014. Montmorillonite and vermiculite as solid phases for the preconcentration of trace elements in natural waters: Adsorption and desorption studies of As, Ba, Cu, Cd, Co, Cr, Mn, Ni, Pb, Sr, V, and Zn. Appl. Clay Sci., 99: 289-296.
- Wu, P.X., Zhang, Q., Dai, Y.P., Zhu, N.W., Dang, Z., Li, P., Wu, J.H. and Wang, X.D. 2011. Adsorption of Cu(II), Cd(II) and Cr(III) ions from aqueous solutions on humic acid modified Ca-montmorillonite. Geoderma, 164: 215-219.
- Xia, L., Hu, Y.X. and Zhang, B.H. 2014. Kinetics and equilibrium adsorption of copper (II) and nickel (II) ions from aqueous solution using sawdust xanthate modified with ethanediamine. Trans. Nonferrous Met. Soc. China, 24: 868-875.
- Adsorption Isotherm and Equilibrium Process of Dye Wastewater Onto Camphor Sawdust
Authors
1 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 2 (2016), Pagination: 689-692Abstract
The textile industry plays an important role in the economies of numerous countries around the world. But the dye wastewater from the textile industry has become one of the most serious environmental problems today for its harm, especially in aquatic environments. Dyes are aromatic organic colorants and have potential applications in textile, plastic, rubber, paper and food industries. Therefore, the treatment of dye wastewater is of interest. The potential and effectiveness of the camphor sawdust was studied as an alternative adsorbent for the removal of dye wastewater. The dye Congo red was used as the pollutant. The effects of camphor sawdust dosage, pH in aqueous solution, the contact time and dye Congo red concentration on dye Congo red adsorption by the camphor sawdust were investigated. The results showed that the reaction factors had an important influence on adsorption process. The adsorption isotherm fitted better with the Langmuir model and the adsorption process was an endothermic process. The maximum adsorption capacity obtained from the Langmuir isotherm is 29.51 mg/g.Keywords
Adsorption Isotherm, Equilibrium Process, Dye Wastewater, Camphor Sawdust.References
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- Removal of the Dye Congo Red in Aqueous Solution by the Modified Camphor Sawdust Adsorbent
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 1 (2016), Pagination: 301-304Abstract
In recent years, there has been growing interest in finding inexpensive and effective adsorbents such as tea waste, wood, sawdust, kaolin, bentonite and peat. Sawdust is one of the promising adsorbents for removing dye pollutants from wastewaters. In this paper, the modified camphor sawdust is obtained from camphor sawdust with 5% cetyltrimethyl ammonium bromide solution activation. Then, the pore structure characteristics and adsorption dye wastewater in the aqueous solution capacity of the camphor sawdust were investigated. The kinetic and isotherm adsorption of dye wastewater by the camphor sawdust modified with surfactant are discussed in detail. The dye Congo red was chosen as the dye wastewater. The equilibrium data were better represented by Langmuir isotherm model than done by the Freundlich isotherm model. The adsorption process of the modified camphor sawdust for dye Congo red is homogenous. The maximum adsorption capacity obtained from the Langmuir isotherm is 125.39 mg/g.Keywords
Dye Congo Red, Wastewater, Adsorption, Modified Camphor Sawdust.- Adsorption of Dye in Aqueous Solution by the Waste Polymer Activated Carbon
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 4 (2016), Pagination: 1227-1230Abstract
The waste polymer activated carbon was prepared from tyre by NaOH activation, which was used for the adsorption of dye Direct Scarlet 4BS in aqueous solution. The influences of pH value, activated carbon dosage, adsorption time and reaction temperature on adsorption rate were discussed in details. It was shown that the activated carbon dosage, adsorption time and reaction temperature had an important effect on the removal of dye Direct Scarlet 4BS in aqueous solution. However, the removal of dye Direct Scarlet 4BS was little dependent on pH value in solution. At 0.6g of activated carbon, 60mg/L of initial dye concentration, 60min, 35°C and pH 4.0, the removal of dye Direct Scarlet 4BS reached 85.14%.Keywords
Waste Polymer, Activated Carbon, Direct Scarlet 4BS Dye, Adsorption.References
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- Fernando, M.M., Carlos, P.B., Thais, H.M.F., Eder, C.L., Betina, R., Tatiana, C. and Solange, B.F. 2011. Adsorption of reactive red M-2BE dye from water solutions by multiwalled carbon nanotubes and activated carbon. J. Hazard. Mater., 192(3): 1122-1131.
- Kauspediene, D., Kazlauskiene, E., Gefeniene, A. and Binkiene, R. 2010. Comparison of the efficiency of activated carbon and neutral polymeric adsorbent in removal of chromium complex dye from aqueous solutions. J. Hazard. Mater., 179(1-3): 933-939.
- Li, Y.H., Du, Q.J., Liu, T.H., Peng, X.J., Wang, J.J., Sun, J.K., Wang, Y.H., Wu, S.L., Wang, Z.H., Xia, Y.Z. and Xia, L.H. 2013. Comparative study of methylene blue dye adsorption onto activated carbon, graphene oxide, and carbon nanotubes. Chem. Eng. Res. Design, 91(2): 361-368.
- Marielen, C.R., Matthew, A.A., Lizie, D.T.P., Eder, C.L., Renato, C., Liliana, A.F., Puchana-Rosero, M.J., Fernando, M.M., Flávio, A.P. and Tatiana, C. 2014. Comparison of a homemade cocoa shell activated carbon with commercial activated carbon for the removal of reactive violet 5 dye from aqueous solutions. Chem. Eng. J., 248(15): 315-326.
- Michael, J.G., Redding, A.M. and Fred, S.C. 2015. A rapid kinetic dye test to predict the adsorption of 2-methylisoborneol onto granular activated carbons and to identify the influence of pore volume distributions. Water Res., 68(1): 784-792.
- Noorimotlagh, Z., Soltani, R.D.C., Khataee, A.R., Shahriyar, S. and Nourmoradi, H. 2014. Adsorption of a textile dye in aqueous phase using mesoporous activated carbon prepared from Iranian milk vetch. J. Taiwan Inst. Chem. Eng., 45(4): 1783-1791.
- Zahra, E. and Azizian, S. 2014. Preparation of activated carbon from date sphate using microwave irradiation and investigation of its capability for removal ofdye pollutant from aqueous media. J. Anal. Appl. Pyrol., 108: 176-184.
- The Influence of the Coexisting Anions on the Adsorption of Perchlorate from Water by the Modified Orange Peels
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Pharmacology and Health, Shaoxing University, Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 4 (2016), Pagination: 1359-1362Abstract
Activated carbons obtained from agricultural by-products have the some advantage like efficiency and low cost, if they are compared with non-renewable coal-based granular activated carbons. The abundance and availability of agricultural by-products make them good sources of raw materials for activated carbon production. The modified orange peels were prepared from orange peels by the chemical activation. The effect of pH value and coexisting anions (NO3-, SO42- and PO43-) were discussed in detail. Furthermore, adsorption isotherm for adsorption of ClO4- ions on the modified orange peels was studied. The experimental results showed that the values of pH and coexisting anions have an important influence on the adsorption of ClO4- ions by the modified orange peels. The Freundlich adsorption isotherm model was suitable for the ClO4- ions in solution. The adsorption process of ClO4- ions in solution by the modified orange peels is not uniform.Keywords
Adsorption, Coexisting Anions, Perchlorate, Modified Orange Peels.References
- Anastopoulos, I. and Kyzas, G.Z. 2014. Agricultural peels for dye adsorption: A review of recent literature. J. Mol. Liq., 200: 381389.
- Bharathi, K.S. and Ramesh, S.T. 2013. Removal of dyes using agricultural waste as low-cost adsorbents: a review. Appl. Water Sci., 3: 773-790.
- Fernandez, M.E., Ledesma, B., Romn, S., Bonelli, P.R. and Cukierman, A.L. 2015. Development and characterization of activated hydrochars from orange peels as potential adsorbents from emerging organic contaminants. Bioresour. Technol., 183: 221-228.
- Fernandez, M.E., Nunell, G.V., Bonelli, P.R. and Cukierman, A.L. 2014. Activated carbon developed from orange peels: batch and dynamic competitive adsorption of basic dyes. Ind. Crops Prod., 62: 437-445.
- Freundlich, H.M.F. 1906. Uber die adsorption in losungen (adsorption in solution). Z. Phys. Chem., 57: 384-470.
- Hashemian, S., Salari, K. and Yazdi, Z.A. 2014. Preparation of activated carbon from agricultural wastes (almond shell and orange peel) for adsorption of 2-pic from aqueous solution. J. Ind. Eng. Chem., 20: 1892-1900.
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- Köseoglu, E. and Akmil-Basar, C. 2015. Preparation, structural evaluation and adsorptive properties of activated carbon from agricultural waste biomass. Adv. Powder Technol., 26: 811-818.
- Langmuir, I. 1916. The constitution and fundamental properties of solids and liquids. J. Am. Chem. Soc., 38: 2221-2295.
- Luo, W.H., Sasaki, K. and Hirajima T. 2015. Surfactant-modified montmorillonite by benzylocatadecyl dimethyl ammonium chloride for removal of perchlorate. Colloids and Surfaces A: Physicochem. Eng. Aspects, 481: 616-625.
- Oliveira, I., Blöhse, D. and Ramke, H.G. 2013. Hydrothermal carbonization of agricultural residues. Bioresour. Technol. 142: 138-146.
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- Song ,W., Gao, B.Y., Xu, X., Zhang, T.G., Liu, C., Tan, X., Sun, S.L. and Yue, Q.Y. 2015. Treatment of dissolved perchlorate by adsorption-microbial reduction. Chem. Eng. J., 279: 522-529.
- Yagub, M.T., Sen, T.K., Afroze, S. and Ang, H.M. 2014. Dye and its removal from aqueous solution by adsorption: a review. Adv. Colloid Interf. Sci., 209: 172-184.
- Adsorption of Bromate in Aqueous Solution by the Modified Activated Carbon
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Life Science, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 3 (2016), Pagination: 981-986Abstract
The presence of bromate in drinking water has attracted much attention, because it is a carcinogen and mutagenic to humans. Activated carbon is an effective adsorbent material widely used in water treatment. In order to enhance the adsorption of bromate ion on activated carbon, the modified activated carbon was obtained from granular activated carbon by chemical activation using cationic surfactant as an activator. The adsorption characteristics of bromate ion on the modified activated carbon were investigated through adsorption experiments. The effects of temperature, pH in solution, contact time and initial bromate concentration on bromate adsorption by the modified activated carbon were investigated. The experimental data were analysed by the Langmuir and Freundlich models of adsorption. Kinetic adsorption data were analysed by the pseudo-first-order kinetic model and the pseudo-second-order model respectively. The thermodynamics parameters were also calculated.Keywords
Adsorption, Bromate, Activated Carbon.References
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- Removal of High Concentration of Ammonia from Wastewater by the Ion Exchange Resin
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, P.R., CN
2 Department of Pharmacology and Health, Shaoxing University Yuanpei College, Shaoxing, 312000, P.R., CN
Source
Nature Environment and Pollution Technology, Vol 16, No 1 (2017), Pagination: 261-264Abstract
Nitrogen (N) is an essential element for living organisms in aquatic ecosystem. However, excess nitrate in this ecosystem could degrade water quality due to eutrophication. Ammonia is usually found in aqueous environments. It affects fish and other aquatic life and recreational use of water. In this study, the acidic ion exchange resins were chosen as adsorbent to adsorb the high concentration of ammonia from wastewater. The experimental results showed that reaction of temperature, the amount of the ion exchange resins and reaction time had an important influence on the removal rate of high concentration of ammonia from wastewater. The experimental data correlated well with the Langmuir adsorption isotherm. It was also suggested that the adsorption process was homogeneous adsorption. The ammonia from aqueous solution adsorption on the acidic ion exchange resins was a monolayer adsorption.
Keywords
Ammonia, Acidic Ion Exchange Resin, Adsorption Isotherm.References
- Bhatnagar, A. and Sillanpää, M. 2011. A review of emerging adsorbents for nitrate removal from water. Chem. Eng. J., 168: 493-504.
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- Fang, Y.T., Zuo, S.Q., Liang, X.H., Cao, Y.F., Gao, X.N. and Zhang, Z.G. 2016. Preparation and performance of desiccant coating with modified ion exchange resin on finned tube heat exchanger.
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- Gendel, Y. and Lahav, O. 2013. A novel approach for ammonia removal from fresh-water recirculated aquaculture systems, comprising ion exchange and electrochemical regeneration. Aquacult.
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- Lahav, O., Schwartz, Y., Nativ, P. and Gendel, Y. 2013. Sustainable removal of ammonia from anaerobic-lagoon swine waste effluents using an electrochemically regenerated ion exchange process.
- Chem. Eng. J., 218: 214-222.
- Langmuir, I. 1918. The adsorption of gases on plane surfaces of glass, mica and platinum. J. Am. Chem. Soc., 40: 1361-1403.
- Milmile, S.N., Pande, J.V., Karmakar, Bansiwal, S. A., Chakrabarti, T. and Biniwale, R.B. 2011. Equilibrium isotherm and kinetic modeling of the adsorption of nitrates by anion exchange Indion NSSR resin. Desalination, 276: 38-44.
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- Equilibrium and Kinetic Studies on Removal of Cd2+ Ion in Aqueous Solution by the Multiple Modified Diatomite
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Department of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 4 (2017), Pagination: 1249-1254Abstract
The problem of metal pollution was regarded by many researchers for a long time. The wastewater containing metal ions must be treated. A composite modification technology of acid activating, sodium hydroxide and baking was applied to improve the diatomite adsorption ability, and a modified diatomite was prepared. The adsorption experiment of the metal wastewater by the modified diatomite was carried out in detail. The modified diatomite owned the high adsorption capacity of the Cd2+ ion. The operating parameters, such as contact time, concentration of Cd2+ ion and reaction temperature, had an important effect on the removal of the Cd2+ ion in aqueous solution. The adsorption of Cd2+ ions onto the modified diatomite was 9.65 mg/g. The adsorption process fits well with the Langmuir isotherm model and the pseudo-second-order kinetics model and it implied that the adsorption was mainly a physical process. The adsorption process is chemisorption, which involves a sharing of electrons between the adsorbate and the surface of the adsorbent.Keywords
Cd2+, Multiple Modified Diatomite, Adsorption, Kinetic Studies.- The Adsorption Capacity and Influencing Factors of Cr3+ by the Modified Zeolite from Fly Ash
Authors
1 Department of Architecture Engineering, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 3 (2017), Pagination: 867-871Abstract
In this study, the modified zeolite from fly ash was prepared and used as an adsorbent for removal of Cr3+ ion from aqueous solution. The characteristic of the modified zeolite was analysed. The adsorption capacity and influencing factors, such as contact time, pH in solution, the modified zeolite dosage, initial concentration of Cr3+ and temperature, were discussed in detail by the adsorption experiments. The experimental results showed that the modified zeolite from fly ash, own high adsorption capacity for Cr3+ ion in aqueous solution. The influencing factors had an important influence on the adsorption capacity. The removal efficiency of Cr3+ ion increased with the increase of the modified zeolite dosage. However, the removal efficiency of Cr3+ ion decreased with the increase of the initial concentration of Cr3+ ion in aqueous solution. The experimental results showed that the modified zeolite from fly ash has a strong potential ability for removal of Cr3+ ion in aqueous solution.Keywords
Adsorption, Cr3+ Ion, Modified Zeolite, Fly Ash.- Treatment of the Acrylic Fibre Wastewater by Fenton Process
Authors
1 Department of Architecture Engineering, Shaoxing University Yuanpei College, Shaoxing, 312000, CN
2 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 2 (2017), Pagination: 623-626Abstract
The acrylic fibre is one of the major synthetic fibres commonly used in the mass production of clothing. However, the effluents of the acrylic fibre manufacturing contain amounts of organic and inorganic contaminants. Some of these pollutants are toxic and bio-refractory, which may cause serious environmental impacts if they are discharged directly into receiving waters without appropriate treatment. In this study, the Fenton process was used for the treatment of acrylic fibre wastewater. The operational parameters were evaluated according to the single factor experiments. The results showed that the H2O2 dosage, Fe2+ dosage, pH value and reaction time had an important role on the effect of treatment of the acrylic fibre wastewater. The most significant interactive influence of Fe2+ dosage and pH value was observed. Under the following reaction conditions, such as H2O2dosage of 80 mmol/L, Fe2+ dosage of 25 mmol/L, initial pH value of 3 and a reaction time of 110 min, the COD removal efficiency of the acrylic fibre wastewater was 45.2%.Keywords
Acrylic Fiber Wastewater, Fenton Process, Operational Parameters.- Kinetic and Thermodynamic Studies on the Adsorption of Zinc Ions from Aqueous Solution by the Blast Furnace Slag
Authors
1 College of Life Science, Shaoxing University, Shaoxing, 312000, CN
2 Environmental Protection Agency of Dinghai District Zhoushan, Zhoushan, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 2 (2017), Pagination: 639-642Abstract
In this work, the adsorption ability of the blast furnace slag to adsorb Zn2+ ions in aqueous solution was investigated. The experimental results are discussed in detail. The adsorption kinetic studies showed that the adsorption of Zn2+ ion from aqueous solution by the blast furnace slag better fits to pseudo second order kinetic model. It implies that the predominant process is chemisorption, which involves a sharing of electrons between the adsorbate and the surface of the adsorbent. The adsorption isotherm studies showed that Langmuir adsorption isotherm model was more suitable for the Zn2+ ion from aqueous solution than the Freundlich adsorption isotherm model. It was also suggested that the adsorption process was homogeneous adsorption. The thermodynamic parameters of ΔG0, ΔH0 and ΔS0 are -0.04 kJ/mol, 51.35 kJ/mol and 165.42 J.mol-1.K-1 respectively. It implied that the adsorption process is an endothermic reaction and chemical adsorption process.Keywords
Kinetic Studies, Adsoption, Zinc, Blast Furnace Slag.- Study on the Degradation of Azo Dye Wastewater by Zero-Valent Iron
Authors
1 College of Pharmacy and Health, Shaoxing University Yuanpei College, Shaoxing, 312000,, CN
2 Department of Environmental Monitor Station, Qingtian, Zhejiang, 323900, CN
3 College of Life Science, Shaoxing University , Shaoxing, 312000, CN
Source
Nature Environment and Pollution Technology, Vol 17, No 2 (2018), Pagination: 479-483Abstract
Wastewater from fabric and yarn dyeing impose serious environmental problems because of their colour and potential toxicity. The release of coloured wastewaters in ecosystems is a dramatic source of aesthetic pollution, eutrophication and perturbations in aquatic life. The most common group of commercial dyes used in the textile industries is azo dyes. The degradation of azo dye wastewater by zero-valent iron was investigated. The dye of C.I. Reactive Red 15 was chosen as object in the experiment. The effects of the dosage of zero-valent iron, pH in solution, reaction time and the initial azo dye concentration on the decolorization were studied in detail. The results showed that the pH value, the dosage of zero-valent iron and the initial azo dye concentration had an important impact on azo dye decolorization. High decolorization efficiency of azo dye wastewater by zero-valent iron was achieved under the optimal condition. The zero-valent iron was also proved to be a universal and efficient reductant for rapid decolorization of the azo dye wastewater. This method can be applied into the treatment of the azo dye wastewater.Keywords
Decolorization, Azo Dye Wastewater, Zero-Valent Iron, C.I. Reactive Red 15.References
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